And elmer e



(NoMoael.)

J. HEARNE 8; E. B. CISCO.

MACHINE FOR TAPPING MAINS.

A TTOHNEYS.

Unire STATES JOHN HEARNE, OF NEW YORK,` 4AND ELMER F.. CISCO, OFBROOKLYN, NEW YORK.

MACHINE FOR TAPPIN'G MAINS.

SPECIFICATION forming part of Letters Patent No. 534,881, dated February26, 1895. Application led October 24,1894. Serial No. 526,840. (Nomodel.)

'7.70 all whom t may concern.:

Be it known that we, JOHN HEARNE, ot' the city and county of New York,and ELMER E. CISCO, of Brooklyn, in the county of Kings, State of NewYork, have invented a new and Improved Machine for Tapping Mains, ofwhich the following is a full, clear, and exact description.`

Our invention relates to a gas-tapping machine, and it has for itsobject to provide a machine adapted to be fastened upon a pipe, and soconstructed that a hole maybe drilled, reamed and tapped in the pipewithout the escape ot' gas from the machine during the operation, withno loss of gas from the pipe itself, and also without danger ofasphyxiation.

A further object of the invention is to provide a gas-tapping machinewhich will comprise but few parts, and be very light and durable andcapable of ready application to a pipe without the use or aid ofwrenches, and by means of which drilling can be done at any angle.

The invention consists in the lnovel construction and combination of theseveral parts, as will be hereinafter fully set forth, and pointed outin the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar figures and letters of referenceindicate corresponding parts in all the views.

Figure 1 is a central vertical section through the machine, and likewisea longitudinal section through a pipe to be tapped, upon which themachine is secured. Fig. 2 is a partial side elevation of the machine,the pipe being in transverse section, and Fig. 3 is a plan View of thering carrying the attaching device.

In carrying out the invention the machine consists of a cylinder A,which virtually constitutes the body of the machine, the said cylinderbeing open at the bottom, and is provided with a stuffing box 10 at thetop. The cylinder is provided further with an exterior thread 11, andwith an interior thread 12 at its bottom portion. A hand wheel 13, orits equivalent, is secured upon the exterior of the cylinder, and thehub of the said wheel is provided with an exterior groove or channel13a, in-which aring 14 is loosely fitted,

whereby the ring may turn upon the wheel. This ringis shown in detail inFig. 3,in which it will be observed it is made in two sections a and a',each section at its ends being provided with a lug 15. Bolts 16 arepassed through opposing lugs of the sections when they are in place uponthe hand wheel, and a hook 17 is pendent from each of thesaid bolts. Thesaid hook, however, may be substituted by an eye or au equivalent, thehooks being adapted to receive links of a chain 18, after said chain hasbeen passed around the pipe B to be tapped.

A standard 19 is erected preferably upon the top portion of thecylinder, and said standard is curved at its top inwardly over the box10, and at its upper extremity the standard is provided with a feedscrew 20, turned usually by means of a hand wheel 21,01' like de vice. Adrill or combination tool C, is passed into the cylinder and through thestufngbox 10, and the lower portion of the said tool is formed with adrill point 22, a reaming section 23 and a tapping section 24. The upperportion of the shank of the tool is squared or rendered polygonal, asshown at 25 in the ....drawings, to receive, for example, a ratchetwrench 26, and the feed screw is adapted to have bearing upon the upperportion of thiswrench when in place, as shown in Fig. 1.

A collar 27 is provided with a iange 28, which is fitted to the outercontour of the pipe, and the said flange, or the collar proper, isprovided with a suitable packing 2,9. The exterior of the collar iangeis threaded in or der that the cylinder of the machine may be screwedthereto. Thus, in operation, the collar is made to fit upon the exteriorof the pipe around the surface that is to be tapped. The chain 18 isattached to one of the hooks 17, and is then passed around the pipe andsecured to the other hook, and the hand wheel 13 is thereuponmanipulated to tighten the chain in a manner to hold the machine firmlyupon the pipe, the packing 29 in the collar 27 preventing the escape ofgas from the machine. The ratchet is then manipulated together with thefeed screw 20, and after the drill point has made a proper hole in thepipe the roaming section 23 will ream the said hole, while the tappingsection 24. closely following will tap the hole. Meanwhile any gas IOOthatmay have escaped will be contained Within the chamber A, from whichit can not escape, and consequently no odor of gas occurs where thetapping is carried on.

The machine, after the tapping is completed, may be quickly removed anda plug placed in position, to close the tapped hole.

This machine is light, simple and durable, it is portable and is capableof ready application to a pipe, or disconnection therefrom.

Having thus described our invention, we claim as new and desire tosecure by Letters Patentl. In a tapping machine, the combination of thebody having a screw threaded portion, a hand-wheel threaded to screw onthe screwthreaded portion of the body, and a ring loosely carried onsaid hand-wheel and provided With means for attaching achain thereto,substantially as set forth.

2. In a tapping machine, the combination of the body having ascrew-threaded portion, a hand-wheel threaded to screw on thescrewthreaded portion of the body and provided with a peripheral groove,and a ring loosely mounted in said peripheral groove and provided withmeans for attaching a chain thereto, substantially as set forth.

3. In a tapping machine, the combination of the body having ascrew-threaded portion, a hand-wheel threaded to screw on thescrewthreaded portion of the body, and provided with a peripheralgroove, and a ring composed of two sections connected together at, andhaving hooks arranged between their adjacent ends, said ring beingarranged inpsaid peripheralgroove in the hand-Wheel, substantially assetforth.

4E. In a tapping machine, the combination of a hollow exteriorlyscrew-threaded body adapted for air-tight connection with the pipe to betapped, a feed mechanism, a tool operated from the feed mechanism andlocated in the hollow. body, and a hand-Wheel having a threaded portionadapted to screw on the eX- terior screw thread of the body and providedwith means for attaching a chain thereto, substantially as set forth.

5. In a gas-tapping machine, the combination, with a collar providedwith aseat adapted for gas-tight connection with a pipe,a cylinderconnected with the co1lar,a hand wheel adjustable upon the cylinder, aring loosely mounted upon the wheel, and a clamping chain adapted to becarried by the said ring, of a feed device, a tool entered into the saidcylinder in a gas-tight manner, terminating at its lower end in a drillpoint, a reaming section land a tap section, and means, substantially asshown and described, for rotat- 6o ing said tool, as and for the purposespecified.

JOHN HEARNE. ELMER E. CISCO. IVitnesses:

J. FRED AOKER, C. SEDewIcK.

